CN203572774U - Nitrogen dioxide detection device - Google Patents
Nitrogen dioxide detection device Download PDFInfo
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- CN203572774U CN203572774U CN201320742480.XU CN201320742480U CN203572774U CN 203572774 U CN203572774 U CN 203572774U CN 201320742480 U CN201320742480 U CN 201320742480U CN 203572774 U CN203572774 U CN 203572774U
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- cover plate
- hydrophilic film
- nitrogen dioxide
- reaction chamber
- testing device
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Abstract
The utility model provides a nitrogen dioxide detection device which comprises a first cover plate and a second cover plate, wherein a sealed reaction cavity is formed between the first cover plate and the second cover plate; the reaction cavity is internally provided with a hydrophilic film; the hydrophilic film is adhered to the first cover plate; the first cover plate is further provided with an air inlet passage and an air outlet passage which are communicated with the reaction cavity; the air inlet passage and the air inlet passage are positioned on two sides of the hydrophilic film; the first cover plate is provided with a liquid inlet passage and a liquid outlet passage which are communicated with the reaction cavity; the hydrophilic film covers the ports of the liquid inlet passage and the liquid outlet passage; the part, which is positioned on the reaction cavity, of the second cover plate is further provided with a viewing window; a glass sheet is further arranged between the viewing window and the reaction cavity; the viewing window is internally provided with a photoelectric sensor. The photoelectric sensor is used for detecting light generated by gas liquid reaction so as to obtain the concentration of nitrogen dioxide, and the detection precision and reliability of the nitrogen dioxide detection device can be improved.
Description
Technical field
The utility model relates to a kind of gas-detecting device, relates in particular to a kind of Nitrogen dioxide testing device.
Background technology
Nitrogen dioxide is one of major pollutants in atmosphere, its photodissociation is the important sources of Tropospheric ozone, with the reaction product nitric acid of hydroxyl radical free radical be the one of the main reasons that forms acid rain, also can generate organonitrogen compound with atmosphere organic peroxy free radical reaction and cause regional environment problem.Nitrogen dioxide has spread effect to human respiratory tract's system, can bring out the breathing problems such as bronchitis, asthma.Nitrogen dioxide in atmosphere mainly comes from the artificial pollutions such as combustion of fossil fuel, vehicle exhaust and industrial discharged waste gas, nitrogen dioxide in Accurate Determining ambient atmosphere is for understanding atmospheric pollution mechanism, judgement atmospheric pollution level, determine pollution source, carry out air quality early warning, and it is all significant help to formulate rational urban planning and construction etc.In Nitrogen dioxide testing device of the prior art, mostly use electrochemical sensor, and electrochemical sensor all exists shortcomings such as sensitivity degree is low, poor stability, cause the accuracy of detection of Nitrogen dioxide testing device of the prior art lower, reliability is poor.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of Nitrogen dioxide testing device is provided, solve the defect that accuracy of detection is lower, reliability is poor of Nitrogen dioxide testing device in prior art, realize the accuracy of detection and the reliability that improve Nitrogen dioxide testing device.
The technical scheme that the utility model provides is, a kind of Nitrogen dioxide testing device, comprise the first cover plate and the second cover plate, described the first cover plate and described the second cover plate are fixed together, between described the first cover plate and described the second cover plate, form airtight reaction chamber, in described reaction chamber, be provided with hydrophilic film, described hydrophilic film is attached on described the first cover plate, on described the first cover plate, be also provided with inlet channel and the outlet passageway being communicated with described reaction chamber, described inlet channel and outlet passageway are positioned at the both sides of described hydrophilic film, on described the first cover plate, be also provided with described reaction chamber and be communicated with feed pathway and liquid outlet channel, described hydrophilic film covers in the port of described feed pathway and described liquid outlet channel, the part that is positioned at described reaction chamber on described the second cover plate also offers view window, between described view window and described reaction chamber, is also provided with glass sheet, in described view window, is provided with photoelectric sensor.
Further, in described feed pathway, be also provided with buffering screen cloth.
Further, described buffering screen cloth is positioned at the port of described feed pathway and abuts in described hydrophilic film.
Further, described hydrophilic film is vertically placed, and the both sides of described hydrophilic film are provided with adhesive tape, and described adhesive tape is fixed on described the first cover plate, and described hydrophilic film is fixed between two described adhesive tape.
Further, described glass sheet is clipped between described the first cover plate and described the second cover plate, between described glass sheet and described the first cover plate and described the second cover plate, is respectively arranged with O-ring seal.
Further, described hydrophilic film is silk, pure cotton cloth, glass fiber filter or polypropylene hot blast nonwoven fabrics.
The Nitrogen dioxide testing device that the utility model provides, by based on liquid phase surface chemistry principle of luminosity, nitrogen dioxide can effectively be strengthened gas liquid reaction after entering into reaction chamber, the light that simultaneously detects gas liquid reaction generation by photoelectric sensor is to obtain the concentration of nitrogen dioxide, improve greatly the response speed and the sensitivity that detect, also guaranteed the stability detecting simultaneously; In addition, reagent can spread apart more rapidly and uniformly by hydrophilic film, is more conducive to nitrogen dioxide and reagent and carries out abundant gas liquid reaction, improves accuracy of detection and the reliability of Nitrogen dioxide testing device.In addition, the simple in structure of Nitrogen dioxide testing device carried to go out, for the nitrogen dioxide gas concentration under different occasions, detect, the nitrogen dioxide gas real time on-line monitoring and the super low concentration nitrogen dioxide gas in soil volatilization gas that are particularly useful in the gaseous samples such as ambient atmosphere, fume emission detect.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model Nitrogen dioxide testing device embodiment;
Fig. 2 is the cut-open view of the utility model Nitrogen dioxide testing device embodiment.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As Figure 1-Figure 2, the present embodiment Nitrogen dioxide testing device, comprise the first cover plate 1 and the second cover plate 2, the first cover plate 1 and the second cover plate 2 are fixed together, between the first cover plate 1 and the second cover plate 2, form airtight reaction chamber 10, in reaction chamber 10, be provided with hydrophilic film 3, hydrophilic film 3 is attached on the first cover plate 1, on the first cover plate 1, be also provided with the inlet channel 11 and the outlet passageway 12 that are communicated with reaction chamber 10, inlet channel 11 and outlet passageway 12 are positioned at the both sides of hydrophilic film 3, on the first cover plate 1, be also provided with and be communicated with feed pathway 13 and liquid outlet channel 14 with reaction chamber 10, hydrophilic film 3 covers in the port of feed pathway 13 and liquid outlet channel 14, the part that is positioned at reaction chamber 10 on the second cover plate 2 also offers view window (not shown), between view window and reaction chamber 10, is also provided with glass sheet 4, is provided with photoelectric sensor 5 in view window.
Particularly, the present embodiment Nitrogen dioxide testing device is provided with hydrophilic film 3 in reaction chamber 10, feed pathway 13 can be transported to reagent in reaction chamber 10, and reagent can spread apart rapidly and uniformly under Action of Gravity Field in hydrophilic film 3, and inlet channel 11 is delivered to gas to be detected in reaction chamber 10, nitrogen dioxide in gas to be detected will with the luminescence-producing reaction of reagent generation surface chemistry, and photoelectric sensor 5 is by sensed light signal and be converted into electric signal output, the electric signal of photoelectric sensor 5 outputs passes through, after computing, just can be converted to content of nitrogen dioxide numerical value.Than adopting electrochemical sensor, the photoelectric sensor 5 in the present embodiment can detect the concentration of nitrogen dioxide more accurately, and has higher sensitivity and stability; Simultaneously, the present embodiment Nitrogen dioxide testing device is based on liquid phase surface chemistry principle of luminosity, by detecting the light of nitrogen dioxide and reagent generation surface chemistry luminescence-producing reaction generation, detect the concentration of nitrogen dioxide, in testing process, only have nitrogen dioxide can with corresponding reagent generation surface chemistry luminescence-producing reaction, the impact of other materials can be subject to, thereby the concentration of nitrogen dioxide can be detected more accurately.
Further, the reagent of exporting for fear of feed pathway 13 produces excessive impulsive force to hydrophilic film 3, is also provided with buffering screen cloth 131 in feed pathway 13.Concrete, the reagent of feed pathway 13 outputs just enters into reaction chamber 10 through buffering screen cloth 131, can effectively slow down the flow velocity of reagent, impulsive force hydrophilic film 3 being produced to reduce reagent; Meanwhile, because reagent flow velocity reduces, can guarantee reagent diffusion in hydrophilic film 3 more uniformly.Preferably, buffering screen cloth 131 is positioned at the port of feed pathway 13 and abuts in hydrophilic film 3, concrete, reagent is after buffering screen cloth 131 deceleration buffers, directly enter in hydrophilic film 3, buffering screen cloth 131 enters into increase reagent the area of hydrophilic film 3, so that reagent diffusion in hydrophilic film 3 more uniformly.And for fixing hydrophilic film 3 conveniently and solidly, hydrophilic film 3 is vertically placed, the both sides of hydrophilic film 3 are provided with adhesive tape 31, and adhesive tape 31 is fixed on the first cover plate 1, and hydrophilic film 3 is fixed between two adhesive tape 31.Concrete, the effect that adhesive tape 31 can play buffering and support hydrophilic film 3, guarantees that hydrophilic film 3 is more firmly fixed on the first cover plate 1 surface.
Further again, in order to improve the sealing property of the present embodiment Nitrogen dioxide testing device, the glass sheet 4 in the present embodiment is clipped between the first cover plate 1 and the second cover plate 2, between glass sheet 4 and the first cover plate 1 and the second cover plate 2, is respectively arranged with O-ring seal 41.Preferably, hydrophilic film 3 in the present embodiment is the film of silk, pure cotton cloth, glass fiber filter or the contour wellability of polypropylene hot blast nonwoven fabrics, high diffusibility, preferably, adopt silk, hydrophilic film 3 is used silk, the invasion speed of reagent on silk is fast, be evenly distributed, and silk, after the reagent of liquid infiltrates, deformation does not occur, make chemiluminescence reaction signal steadily, stable, favorable reproducibility; Silk is little and be easy to rinse to the absorption of reagent.
The concrete operation step of the present embodiment Nitrogen dioxide testing device comprises:
Step 1, outlet passageway connect vacuum pump, and under the effect of vacuum pump, gas to be detected enters into reaction chamber from inlet channel, and from outlet passageway is drawn to reaction chamber;
Step 2, feed pathway connect peristaltic pump, under the effect of peristaltic pump, reagent enters into reaction chamber and under the effect of gravity, is evenly diffused in hydrophilic film from feed pathway, the nitrogen dioxide gas in gas to be detected and the reagent generation surface chemistry luminescence-producing reaction in hydrophilic film; Meanwhile, liquid outlet channel is connected with peristaltic pump or vacuum pump, and under the effect of peristaltic pump or vacuum pump, the reagent that reacted hydrophilic film lower end is drawn to outside reaction chamber by liquid outlet channel;
The Nitrogen dioxide testing device that the utility model provides, by based on liquid phase surface chemistry principle of luminosity, nitrogen dioxide can effectively be strengthened gas liquid reaction after entering into reaction chamber, the light that simultaneously detects gas liquid reaction generation by photoelectric sensor is to obtain the concentration of nitrogen dioxide, improve greatly the response speed and the sensitivity that detect, also guaranteed the stability detecting simultaneously; In addition, reagent can spread apart more rapidly and uniformly by hydrophilic film, is more conducive to nitrogen dioxide and reagent and carries out abundant gas liquid reaction, improves accuracy of detection and the reliability of Nitrogen dioxide testing device.In addition, the simple in structure of Nitrogen dioxide testing device carried to go out, for the nitrogen dioxide gas concentration under different occasions, detect, the nitrogen dioxide gas real time on-line monitoring and the super low concentration nitrogen dioxide gas in soil volatilization gas that are particularly useful in the gaseous samples such as ambient atmosphere, fume emission detect.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a Nitrogen dioxide testing device, it is characterized in that, comprise the first cover plate and the second cover plate, described the first cover plate and described the second cover plate are fixed together, between described the first cover plate and described the second cover plate, form airtight reaction chamber, in described reaction chamber, be provided with hydrophilic film, described hydrophilic film is attached on described the first cover plate, on described the first cover plate, be also provided with inlet channel and the outlet passageway being communicated with described reaction chamber, described inlet channel and outlet passageway are positioned at the both sides of described hydrophilic film, on described the first cover plate, be also provided with described reaction chamber and be communicated with feed pathway and liquid outlet channel, described hydrophilic film covers in the port of described feed pathway and described liquid outlet channel, the part that is positioned at described reaction chamber on described the second cover plate also offers view window, between described view window and described reaction chamber, is also provided with glass sheet, in described view window, is provided with photoelectric sensor.
2. Nitrogen dioxide testing device according to claim 1, is characterized in that, is also provided with buffering screen cloth in described feed pathway.
3. Nitrogen dioxide testing device according to claim 2, is characterized in that, described buffering screen cloth is positioned at the port of described feed pathway and abuts in described hydrophilic film.
4. Nitrogen dioxide testing device according to claim 1, is characterized in that, described hydrophilic film is vertically placed, and the both sides of described hydrophilic film are provided with adhesive tape, and described adhesive tape is fixed on described the first cover plate, and described hydrophilic film is fixed between two described adhesive tape.
5. Nitrogen dioxide testing device according to claim 1, is characterized in that, described glass sheet is clipped between described the first cover plate and described the second cover plate, between described glass sheet and described the first cover plate and described the second cover plate, is respectively arranged with O-ring seal.
6. according to the arbitrary described Nitrogen dioxide testing device of claim 1-5, it is characterized in that, described hydrophilic film is silk, pure cotton cloth, glass fiber filter or polypropylene hot blast nonwoven fabrics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742480.XU CN203572774U (en) | 2013-11-22 | 2013-11-22 | Nitrogen dioxide detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742480.XU CN203572774U (en) | 2013-11-22 | 2013-11-22 | Nitrogen dioxide detection device |
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| CN203572774U true CN203572774U (en) | 2014-04-30 |
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| CN201320742480.XU Withdrawn - After Issue CN203572774U (en) | 2013-11-22 | 2013-11-22 | Nitrogen dioxide detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558212A (en) * | 2013-11-22 | 2014-02-05 | 山东省科学院海洋仪器仪表研究所 | Nitrogen dioxide detecting device and method |
| CN105259166A (en) * | 2015-11-09 | 2016-01-20 | 山东省科学院海洋仪器仪表研究所 | Formaldehyde detection device and method |
| CN105784690A (en) * | 2016-04-22 | 2016-07-20 | 四川理工学院 | Real-time online continuous methanol detecting device and method |
-
2013
- 2013-11-22 CN CN201320742480.XU patent/CN203572774U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558212A (en) * | 2013-11-22 | 2014-02-05 | 山东省科学院海洋仪器仪表研究所 | Nitrogen dioxide detecting device and method |
| CN103558212B (en) * | 2013-11-22 | 2016-03-23 | 山东省科学院海洋仪器仪表研究所 | Nitrogen dioxide testing device and detection method |
| CN105259166A (en) * | 2015-11-09 | 2016-01-20 | 山东省科学院海洋仪器仪表研究所 | Formaldehyde detection device and method |
| CN105259166B (en) * | 2015-11-09 | 2017-12-15 | 山东省科学院海洋仪器仪表研究所 | Formaldehyde examination device and detection method |
| CN105784690A (en) * | 2016-04-22 | 2016-07-20 | 四川理工学院 | Real-time online continuous methanol detecting device and method |
| CN105784690B (en) * | 2016-04-22 | 2019-03-15 | 四川理工学院 | The continuous formaldehyde examination device of real-time online and detection method |
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